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Formulas Review

Formulas Review

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Formulas Review

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  1. Formulas Review

  2. Place the ionic charges for the following groups on the Periodic Table: group 1, group 2, group 13, group 14, group 15, group 16, group 17 and group 18 +1 0 +2 +3 +4 -3 -2 -1

  3. A _____________ is an ion formed from one atom • Monatomic ion

  4. Some ions have a Roman numeral with their symbol. For example, lead II. How are the Roman numeral and charge related? • The Roman numeral tells you the POSITIVE charge of the ion

  5. Suppose strontium formed an ion. How many proton and electrons does a strontium ion have? • Protons = 38 • Electrons = 36 ( a +2 charge means it lost 2 valence electrons so you subtract 2e-)

  6. Suppose sulfur formed an ion. What is the charge of a sulfur ion? • -2

  7. Magnesium has the following electron configuration: 1s2 2s2 2p63s2 2 Mg+2 How many valence electrons are present? _____ What ion will magnesium form? ____________ Explain why using the electron configuration. Loses the 3s2 valence electrons in order to satisfy its octet

  8. What elements are present for most molecular compounds? • ONLY nonmetals

  9. Suppose sulfur formed an ion. How many proton and electrons does a sulfur ion have? • Protons = 16 • Electrons = 18 (it is a -2 charge so it gained 2 valence electrons so you add 2e-)

  10. What is the ending of all monatomic anions? • ide

  11. Determine the name of the ion that would form from the following atoms. sulfide • Atom = sulfur; ion = __________ • Atom = hydrogen ion = __________________ • Atom = oxygen; ion = ___________________ hydride oxide

  12. What elements are present for most ionic compounds? • Metals & nonmetals

  13. A ____________is an ion formed from 2 or more atoms • Polyatomic ion

  14. Classify each of the following as a monatomic anion, monatomic cation, polyatomic anion, or a polyatomic cation. polyatomic anion • O2-2 = _________________ • NH4+1 = ____________ • PO3-3 = _______________ • Br -1 = _______________ • Fe +2 = _________________ polyatomic cation polyatomic anion Monatomic anion Monatomic cation

  15. Anions __________ one or more valence electrons • Gain

  16. Suppose strontium formed an ion. What is the charge of a strontium ion? • +2

  17. Another name for a positive ion is a(n) ______________________ • Cation

  18. What is the ratio between cation(s) & anion(s) in the following ionic compounds? 3 1 1 Li3PO3= ______lithium ion(s) : _____ phosphate ion(s) KCl = _____ potassium ion(s) : ________ chloride ion(s) Mg3(SO3)2 = ____ magnesium ion(s) : ____sulfite ion(s) Ag2SO4 = _____silver ion(s) : _______ sulfate ion(s) 1 3 2 1 2

  19. Another name for a negative ion is a(n) _____________ • Anion

  20. Fluorine has the following electron configuration: 1s2 2s2 2p5 7 F-1 How many valence electrons are present? _____ What ion will fluorine form? ______________ Explain why using the electron configuration. Gains 1 more valence electron in order to satisfy its octet

  21. Cations __________ one or more valence electrons • LOSE